Issue 117

7 Mar: China launched a Long March-3B with the TJS-15 (63157) (and another possible object, likely an apogee kick motor <63299>) from Xichang. According to official sources, the satellite has entered the planned orbit and will be “mainly used to verify multi-band and high-speed satellite communication technology”. After spending ~10 days in Geosynchronous Transfer Orbit, China conducted a circularization burn to place TJS-15 into Geostationary Orbit (GEO). TJS-15 is now at 90.3° E (due south of the Bay of Bengal) with a 0.0° inclination. Launch Video.

https://www.youtube.com/watch?v=eS9jkqstra4

• As is typical for TJS satellites, China has released little information regarding the satellite’s capabilities and mission.

• Reporting from the Joint Commercial Operations cell noted, “The Yuan Wang 6 and Yuan Wang 7 telemetry tracking vessels were both be positioned in the Pacific Ocean to support this launch, suggesting it is of high importance.”

• Per Andrew Jones: “The lack of details on the TJS-15 satellite is consistent with statements on earlier TJS missions. The series, which mostly operates in geostationary orbit (GEO), is seen by Western analysts as potentially carrying out classified missions including signals intelligence, early warning missions and satellite inspection activities to support the People’s Liberation Army (PLA).”

• In the past 10 years China has launched 14 TJS satellites:

  • 2015 (1): TJS-1 (suspected SIGINT)

  • 2016 (0): No Launches

  • 2017 (1): TJS-2 (suspected Missile Warning)

  • 2018 (1): TJS-3 (suspected satellite inspection)

  • 2019 (1): TJS-4 (suspected SIGINT)

  • 2020 (1): TJS-5 (suspected Missile Warning)

  • 2021 (3): TJS-6 (suspected Missile Warning), TJS-7 (Unknown), & TJS-9 (suspected SIGINT)

  • 2022 (0): No Launches

  • 2023 (1): TJS-10 (unknown)

  • 2024 (3): TJS-11 (unknown), TJS-12 (unknown), TJS-13 (HEO, suspected Missile Warning)

  • 2025 (2): TJS-14 (unknown), TJS-15 (unknown)

• The second object noted, is labelled the TJS-15 apogee kick motor (AKM), has not maneuvered and is safely orbiting nearly 400km above the GEO belt.

15 Mar: China launched a Long March-2D with the SuperView Neo-3 02 and Tianyan-23 satellites (63208 & 63209) from Jiuquan. SuperView Neo-3 02 is able to image 130km swaths and with 0.5m resolution. Superview Neo-3 02 joins 9 other SuperView Neo satellites in Low Earth Orbit. It is the second of four planned SuperView Neo-3 wide-swath satellites. Launch Video.

• Editor’s Note: SuperView Neo-3 02 has yet to be specifically identified in the spacetrack.org catalog. However both SuperView Neo-3 02 and Tianyan-23 satellites are co-planar and orbiting at similar altitudes. For this article I’m assuming SuperView Neo-3 02 is “Object A” (63208).

  -SuperView Neo-3 02 is currently orbiting at an average altitude of 502.7km with an inclination of 97.5°. These figures are close to its predecessor, SuperView Neo-3 01 (59510) which is also inclined 97.5° with an average altitude of 500km.

  – The Superview Neo constallation is operated by China Sewei Surveying and Mapping Technology Co Ltd (aka China Sewei). Chine Sewei has placed SuperView Neo-3 02 adjacent to Neo-3 01 and Superview Neo-1 01 (52320) and Superview Neo-1 02 (52321). The two Neo-1 satellites are at an average altitude of 523km and are 97.4° inclined.

  • Neo-3 02 RAAN (twist) is offset ~3.1° west of Neo-3 01 and ~6.3° west of Neo-3 01/02. (see graphic)

  – China Sewei plans call for a Superview NEO constellation of at least 28 total satellites.

  – Per Chinese Social Media Post: One day after launch (16 Mar 2025), “the Kashgar Satellite Ground Receiving Station successfully received the first batch of satellite image data from SuperView-3 02…With an ultra-wide range of 130 kilometers and a resolution of 0.5 meters, the image is clear, with distinct layers, rich details, full colors, uniform image quality, and good radiation consistency. The ground-to-space link and ground system are operating stably, and the satellite has entered the on-orbit test phase.”

– Current Constellation Status

• • SuperView Neo-1 (20 to 30 cm optical): 4 of planned 16 on orbit.
  • SuperView Neo-2 (50 cm SAR): 4 of 8 on orbit.
    • NEO-2 01/02 (53128 & 53130) are co-planar but not operating within proximity of one another. In fact, they operate on opposite sides of the Earth (as one passes the North Pole the other is over the South Pole).
    • NEO-2 03/04 are orbiting in formation and are less than 1km from one another. This is consistent with previous statements that 2-03/04 “will be the first time in the world that a commercial satellite can achieve a 100-meter-level autonomous strict return orbit and sub-meter-level fly-around formation coordinated control.”
  • SuperView Neo-3 (wide-width with 0.7m resolution + 100km swath width): 2 of 4 on orbit. Superview NEO 3-01 launched in April 2024.

16 Mar: Chinese space operators increased the average altitude of the TJS-3 satellite (43874) ~66km. As a result the satellite is above the GEO belt and drifting West at a rate of 0.845° per day. TJS-3 is a suspected inspector satellite that has moved across the GEO belt exhibiting unusual behavior beginning with its launch in 2018 (see COMSPOC video & LSAS video). Prior to its latest maneuver, TJS-3 had been at 148.4°E placing it in the neighborhood with Gaofen-13 02 (55912) (148.2°E) and SJ-21 (49330) (144.9°E).

21 Mar: I’ve been tracking the status of Yaogan-35/36/39/42 triplet formations for nearly 2 years. I’ve noticed a 5 of the 15 formations appear to be struggling (or at least not following their previous pattern). Here is a status update on the 5 outliers.

Background:

Between 6 Nov 2021 and 10 Dec 2023 China conducted 15 LM-2D launches and placed 45 Yaogan satellites into 5 orbital planes (500km SMA and 35° inclination but different RAAN/twist.) Each launch contained 3 satellites which deployed into a Lead, Trail1, Trail2 formation. Each plane had 9 of these satellites, 3 YG-35, 3 YG-36 and 3 YG-39. It appears 4 of the 5 YG-35 triplets are experiencing some difficulties.

Problem Kids: (Lead/Trail1/Trail2)

• Yaogan-35 01 (49391/49390/49393): Launched 6 Nov 2021, this trio has completely fallen apart. The lead satellite has not increased its average altitude in over 11 months and is now orbiting under 400km and appears to be heading for re-entry. The Trail2 satellite has decreased its average altitude independent from the other two satellites several times since 2023 and as a result now has a significant RAAN offset from Trail1. For its part, the Trail1 satellite has maintained its average altitude since launch and recently increased it to 510km, which is the highest it has ever achieved.

• Yaogan-35 02 (52908/52907/59395): Original 3 satellites launched 23 June 2022. After Trail2 satellite failed (has re-entered), China launched Yaogan-42 01 on 2 April 2024 (mislabeled in Spacetrack.org catalog as YG-42 02). More recently, the Lead satellite last increased its average altitude on 7 Feb 2025 and has lost 17km through 23 Mar 2025. As a result it has increased its lead from Trail1 and Trail2 satellites significantly.

• Yaogan-36 02 (54045/54043/54042): Launched 14 Oct 2024. The lead satellite last increased its average altitude on 9 Dec 2024 and has lost 16km through 23 Mar 2025. As a result it has significantly increased its separation from Trail1 and Trail2 satellites. Trail1 and Trail2 satellites continue to maintain their average altitudes.

• Yaogan-35 03 (53320/53318/53316): Launched 29 Jul 2022. Trail2 satellite did not maintain its average altitude from late Jan 2024 – Oct 2024 and as a result lost 63km in altitude and now has a RAAN difference of over 48°. I was surprised to see the Trail2 satellite begin to increase its average orbit in Nov 2024. The satellite continues to slowly increase its SMA but it will never return to formation. The Lead satellite last increased its average altitude on 21 Feb and has dropped 15km in altitude and is increasing its separation with Trail1 (from 451 sec to 1,648 sec).

•  Yaogan-35 04 (53524/53526/53522): Launched 19 Aug 2022. This trio may be ok, but recently the Trail1 satellite increased its average altitude nearly 22km and rapidly fell behind the Lead and Trail2 satellites. Curious that the Trail1 satellite for YG-35 01 recently did something similar.

21 Mar: Many will recall that China launched SJ-25 (62485) on 6 Jan 2025 and announced that it would be “used for the verification of satellite fuel replenishment and life extension service technologies.” We quickly noted that China had placed SJ-25 into a co-planar orbit with SJ-21 which had been used to demonstrate “debris mitigation technology” (it captured a defunct Chinese satellite in GEO and dragged it into a graveyard orbit in early 2022.) SJ-25 appears to have made 3 stationkeeping maneuvers in the past 3 months and is maintaining its position at ~119.5°E. For its part, SJ-21 has not maneuvered but has naturally drifted west from 148.9°E at the time of SJ-25’s launch to 144.2°E on 21 Mar 2025. Without maneuvering SJ-21 is drifting West ~0.125° per day. At this rate it will “pass” SJ-25 in early October 2025.

23 Mar: After decreasing its average altitude to initiate an eastward drift in early February, Luch/Olymp 2 (55841) appears to have found a new neighbor/neighborhood. Russian space operators increased their satellite’s SMA nearly 262kms from 24 Feb – 8 Mar to rejoin the GEO belt at 62.0°E longitude. It appears its new intended collection target is Intelsat 39 (44476) which is at 61.9°E longitude. The Russian satellite is maintaining 15-60km separation from Intelsat 39. Typically Russia will keep Luch/Olymp 2 near its intended target for 4-5 months.